#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  /* color: #2c3e50; */
  /* margin-top: 60px; */
  background: #f9f9f9;
}

html,
body {
  padding: 0;
  margin: 0;
  height: 100%;
}

.box3 {
  display: flex;
}

.boxLeft3 {
  /* min-height: 100px;width: 300px; */
  /* background: #987; */
  flex: 4;
}

.boxRight3 {
  /* min-height: 100px;
  width: 300px; */
  /* background: #369; */
  flex: 4;
}

.boxCenter3 {
  min-height: 100px;
  /* margin: 0 20px; */
  /* padding: 0 40px; */
  width: 1920px;
  background: #fff;
  overflow: hidden;
  /* background: #192; */
  /* flex: 22; */
}